I'm not a hundred % sure on this, but I think when you hire a guide the deal includes avvy gear. (anyone who knows more about this please correct/confirm).
Try and get a group to bring the cost down.
Without transceiver etc I think it'll be hard to persuade anyone to go with you as they'd be putting their neck on the line.
Obv I'm not saying La Grave is intrinsically more likely to avalanche than anywhere else, but once you're over the glacier between 2alpes/la grave you're on your own.
However, if you can make this work then go for it! It's a whole fucking mountain of freeride!